Is it safe to keep my laptop charging all the time?
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Yup, it’s super safe.
In fact, if you’re doing energy-intensive work DO NOT operate without keeping it plugged-in.
Unlike phone batteries (especially non-removable), most laptops have parallel charging circuitry. This means that the device has 2 pathways to receive power. One is from the battery and another is through the ac power source (dc after conversion) directly. You can check if your laptop has this capability by keeping it plugged-in and removing the battery! If it continues to function that means it is parallel charging!
In the case of continuous charging, after reaching ‘full-charge’ the BMS (Battery Management System) by-passes the battery for direct charging (dc supply). Hence for heavy-usage applications (like graphic designing or gaming), it is vital that you DO NOT use without sufficiently full charge or without charger plugged-in. This ensures that the battery is protected from the stress of high power discharge or unbalanced charge/dis-charge.
In the long-term, some small reduction in battery lifetime is noted due to holding at high charge levels. This is because the fully-charged status means that the anaode electrode is stressed and the cell is at maximum entropy.
No” it’s actually good, that allows your laptop to operate in the maximum performance mode as it doesn’t have to worry about draining battery.
You don’t need to worry about the battery, the laptop will simply charge it and then disable it and start operating on wall power only. I fyou diconnect it from the wall it will promptly change you back to the battery.
It won’t be in a constant battery charging state and won’t degrade battery life. Wil actually help it last longer as it will not be charging and discharging so often.
No, modern laptops will automatically detect how much juice to give to the battery. It will almost never be at 100% charged. My msi laptop maintains the battery at around 98%.